ISU Electrical and Computer Engineering Archives

Channel estimation and equalization for ultra-wideband communications with pulse position modulation

Yang, Xiaofan (2005) Channel estimation and equalization for ultra-wideband communications with pulse position modulation. Masters thesis, Iowa State University.

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Abstract

In this thesis we consider the design of an ultra-wideband (UWB) receiver. We investigate channel estimation and equalization algorithms of ultra-wideband radio with pulse position modulation. We propose a completely blind channel estimation method based on the first-order cyclostationarity in the received signal. In contrast to other blind UWB channel estimation methods, our algorithm exhibits low complexity and is robust for channels with large numbers of taps. We investigate equalization by introducing a discrete-time equivalent model for timehopping pulse-position-modulated UWB systems. This equivalent model views the transmitter-channel-receiver system at symbol rate. The computational complexity is reduced by processing the received data at symbol rate instead of chip rate. Symbol detection techniques including decision feedback equalization and maximum likelihood detection are evaluated and compared with correlation detection. Chapter 1 is an introduction to UWB systems, including the development of the technology, current research topics, and recent applications. Chapters 2 and 3 study the channel estimation and equalization problems, respectively. Chapter 4 summarizes the thesis and presents possible future work.

EPrint Type:Thesis (Masters)
Uncontrolled Keywords:Ultra-wideband (UWB), pulse position modulation (PPM), channel estimation, equalization, decision feedback equalization (DFE), maximum likelihood, correlation detection
Subjects:Electrical Engineering > COMMUNICATION & SIGNAL PROCESSING > Wireless Communications
ID Code:159
Identification Number:TR-2005-06-2
Deposited By:Ms Xiaofan Yang
Deposited On:21 June 2005

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